2014 Challenger SRT8, 6 Speed Manual with Arrington Performance Heads & Cam Package. - YouTube Finally delivered! New Dodge Challenger owners have been asking for a heads and cam package that delivers power without damaging drivability. Now that Arrington has full tune-ability of 2013 and 2014 Challengers we went right to work developing calibrations for the packages that are in the highest demand; Heads and Cam. We thought we would take this opportunity to have a discussion with you about the dyno numbers we post which should help everyone understand the process. When releasing dyno numbers it might be tempting to select the lowest baseline and the highest power number observed during the calibration process. This makes for a nice internet video, but might be tough to reproduce day in and day out. So in the interest of transparency, we thought we would take this chance to publish the range of relevant numbers observed throughout the calibration process. Below you will find our actual dyno graphs produced during the development and calibration process of our ported heads and cam package. Build Specs: Factory 392 6.4L HEMI Engine Arrington Phase 6 Heads including CNC porting; Newen Epoc, Single Point, True Radius, CNC Valve Job; Hand Blended; PSI Springs; Viton Seals; hardened locators & retainers; and stock SRT valves Comp VVT 274 Cam: Intake Lift .619, Exhaust Lift .612, Intake Duration @ .050: 224. Exhaust Duration @ .050: 234 Comp Phase Limiter for VVT 6.4L HEMIs API Chromoly push rods with .080 wall, and .210 radius tip API Cold Air Intake Stock exhaust from heads to tail-pipe Picture 1. This is a baseline graph done on the factory tune right after pulling the 2014 Dodge Challenger onto the dyno. With a dyno cell temperature of 61°F, and the vehicle warmed to 150°F coolant temp for a pull of 414.3HP & 417.4TQ. Picture 2. This is the same car on the third pull. Only difference is now the vehicle & driveline is up to operating temperature and the actual dyno cell temp is @ 59.3°F for a pull of 407.9HP & 409.1TQ. Picture 3. With the API Phase 6 Heads / Cam package installed, fully tuned vehicle, engine and driveline at full operating temps the final pull of the day was 471.5HP & 460.9TQ. Picture 4. The exact same car with the exact same calibration is dyno’d the following morning with a cell temp of 45.1°F. The cooler drive train and cell temperatures are worth 17HP. With the coolant temp at 150°F the max HP pull was 495.7HP & 486.6TQ. This final run has been compared to the “best” cold baseline number “published” showing a gain of 81HP. Going forward we are going to show the best numbers and the operating temp numbers as well. Best Baseline of 414HP & 417TRQ versus Best Pull of 495HP & 486TRQ = Net 81HP & 69TRQ Opt Temp Baseline of 408HP & 409TRQ versus Opt Temp Pull of 472HP & 461TRQ = Net 64HP & 52TRQ We hope that this revised reporting method will prove to be more useful and transparent.